Safari won't play video after 26.1 update...

Since updating, video doesn't consistently play. It doesn't matter if it's Facebook, Youtube, traffic cams, etc. video just doesn't play right. It'll load the videos for a bit, then all of a sudden, it will give errors saying that they can't load. I'll restart Safari, and then they'll play again for a while. Rinse and repeat.

I've tried rebooting. I've tried removing cookies and such from a couple sites. It doesn't make any difference.

I'm pretty vanilla. I don't have any extensions. But subsequent to the upgrade, video is screwed.

Anyone got any ideas? Thanks.